BOUT++ nonlinear simulation for a comparative study with the measured 2D ELM structures in the KSTAR H-mode plasma
Abstract
Here, time-dependent nonlinear simulation using the BOUT++ 3-field model is performed for a study of edge localized mode (ELM) dynamics in KSTAR H-mode plasmas. The simulated results of the ELM evolution are directly compared with the 2D ELM structures, measured by electron cyclotron emission imaging systems, from the initial growth to crash phase. The simulation results are qualitatively in good agreement with the observations. Specifically, it is notable in simulation and experiment that higher-n modes in a quasi-steady state phase evolve into lower-n modes close to the ELM-crash in time. It indicates that lower-n modes may be responsible for the onset of the crash. A postanalysis confirms that nonlinear mode coupling between toroidal harmonics may drive the lower-n mode.
- Authors:
-
[1];
[1];
[3];
[4];
- National Fusion Research Inst., Daejeon (South Korea)
- Ulsan National Inst. of Science and Technology (South Korea)
- Pohang Univ. of Science and Technology (South Korea)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Alternative Energies and Atomic Energy Commission (CEA), Saint-Paul-Lez-Durance (France)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); National Research Foundation of Korea (NRF)
- OSTI Identifier:
- 1568014
- Report Number(s):
- LLNL-JRNL-789212
Journal ID: ISSN 1070-664X; 987558; TRN: US2100254
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 5; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Kim, M., Park, H. K., Lee, J., Yun, G. S., Xu, X. Q., and Bécoulet, M. BOUT++ nonlinear simulation for a comparative study with the measured 2D ELM structures in the KSTAR H-mode plasma. United States: N. p., 2019.
Web. doi:10.1063/1.5085891.
Kim, M., Park, H. K., Lee, J., Yun, G. S., Xu, X. Q., & Bécoulet, M. BOUT++ nonlinear simulation for a comparative study with the measured 2D ELM structures in the KSTAR H-mode plasma. United States. https://doi.org/10.1063/1.5085891
Kim, M., Park, H. K., Lee, J., Yun, G. S., Xu, X. Q., and Bécoulet, M. Wed .
"BOUT++ nonlinear simulation for a comparative study with the measured 2D ELM structures in the KSTAR H-mode plasma". United States. https://doi.org/10.1063/1.5085891. https://www.osti.gov/servlets/purl/1568014.
@article{osti_1568014,
title = {BOUT++ nonlinear simulation for a comparative study with the measured 2D ELM structures in the KSTAR H-mode plasma},
author = {Kim, M. and Park, H. K. and Lee, J. and Yun, G. S. and Xu, X. Q. and Bécoulet, M.},
abstractNote = {Here, time-dependent nonlinear simulation using the BOUT++ 3-field model is performed for a study of edge localized mode (ELM) dynamics in KSTAR H-mode plasmas. The simulated results of the ELM evolution are directly compared with the 2D ELM structures, measured by electron cyclotron emission imaging systems, from the initial growth to crash phase. The simulation results are qualitatively in good agreement with the observations. Specifically, it is notable in simulation and experiment that higher-n modes in a quasi-steady state phase evolve into lower-n modes close to the ELM-crash in time. It indicates that lower-n modes may be responsible for the onset of the crash. A postanalysis confirms that nonlinear mode coupling between toroidal harmonics may drive the lower-n mode.},
doi = {10.1063/1.5085891},
journal = {Physics of Plasmas},
number = 5,
volume = 26,
place = {United States},
year = {Wed May 01 00:00:00 EDT 2019},
month = {Wed May 01 00:00:00 EDT 2019}
}
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